<template>
  <div>
     <!-- 面包屑导航区 -->
  <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>数据统计</el-breadcrumb-item>
    <el-breadcrumb-item>数据报表</el-breadcrumb-item>
  </el-breadcrumb>

  <!-- 卡片视图区 -->
  <el-card>
      <!-- 2.为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 900px;height:500px;"></div>
  </el-card>

  </div>
</template>

<script>
// 1.导入echarts
import * as echarts from 'echarts'
import _ from 'lodash'
export default {
 name:'Report',
 data(){
     return{
        // 需要合并的数据
        options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
     }
 },
 created() {
     
 },
//  此时页面上的元素已经被渲染完毕了
 async mounted(){
 // 3.基于准备好的dom，初始化echarts实例
 var myChart = echarts.init(document.getElementById('main'));

 const {data:res}=await this.$http.get(`reports/type/1`)
 if(res.meta.status!==200){
    this.$message.error('获取折线图数据失败')
 }
//4.准备数据和配置项
const result=_.merge(res.data,this.options)
//5.展示数据
myChart.setOption(result);
 },
 methods:{

 }
}
</script>

<style lang='less' scoped>
#main{
    margin:0 auto;
}
</style>